A nice citrus site from Finland.
http://users.kymp.net/citruspages/mainindex.html

Excellently done website.

Finland doesn't know existence or proper categories of various kumquats?

I was wondering whatever happened to the Fortunellas as a major group? Although no longer "officially" classified in the Citrus genus, we know very well how close they are to citruses, from grafting, cross pollination and making hybrids.

The Calamondin is one of them, they accepted the scientific name as Citrus mitis while in fact it is a fortunella hybrid.

If I were to query their database for uniqueness of groups as posted, The only listed major groups are:

Blood oranges
Citrons
Deep blood oranges
Grapefruit
Late juicy oranges
Lemons
Light blood oranges
Limes
Limes / Lemons
Mandarins
Navel oranges
Pomelos
Sour oranges
Sweet early oranges
Sweet oranges
Tangelos


Take note, they may love the blood oranges so much that they have 3 separate entries of blood orange types: the regular blood, light blood, and dark blood oranges.


But from the main site they only have these major groups, still no kumquats:
limes
sour oranges
pomelos
lemons
citrons
grapefruit
mandarins
sweet oranges

From their listing, further queries shows the unique scientific names listed as they have spelled it:
59 uniquely Spelled Species
Aurantium sinense
Citrus aurantiifolia
Citrus aurantium
Citrus aurata
Citrus bajoura
Citrus bergamia
Citrus bigaradia
Citrus bigarradia
Citrus calamondin
Citrus clementina
Citrus crassa
Citrus dadai-mikan
Citrus decumana
Citrus deliciosa
Citrus erythosa
Citrus grandis
Citrus hystrix
Citrus jambhiri
Citrus junos
Citrus latifolia
Citrus lima
Citrus limetta
Citrus limettioides
Citrus limon
Citrus limonelloides
Citrus limonia
Citrus limonimedica
Citrus limonum
Citrus limunum
Citrus lumia
Citrus madurensis
Citrus maxima
Citrus medica
Citrus meyerii
Citrus microcarpa
Citrus mitis
Citrus myrtifolia
Citrus nanshô-daidai
Citrus natsudaidai
Citrus natsumikan
Citrus neoaurantium
Citrus nobilis
Citrus otaitensis
Citrus paradisi
Citrus poonensis
Citrus pyriformis
Citrus reticulata
Citrus reticulatum
Citrus sinensis
Citrus tachibana
Citrus tahitensis
Citrus taiwanica
Citrus tangerina
Citrus torosa
Citrus unshiu
Citrus volkameriana
Citrus vulgaris
Papeda hystrix
X Citrofortunella mitis

And here are the uniquely spelled common names listed. I could easily see the many unique names actually one and the same thing.

for your reference, here is their unique listing.

Adam's apple
Bajoura citron
Bergamot
Bittersweet orange
Boxwood-leaved orange
Calamondin
Cambodian mandarin
Citron
Clementine
Crinkle-leaved chinotto
Curaçao sour orange
Dancy tangerine
Dwarf chinotto
Fingered citron
Grapefruit
Indian lime
Japanese mandarin
Japanese summer orange
Japanese Tosu orange
Kaffir lime
King mandarin
Large chinotto
Lemon
Lemon lime
Lemonange
Lemonime
Lemon'n'lime
Lime
Limetta
Mandarin
Mandarin lemon
Mandarin lime
Mary Ellen sweet lime
Mediterranean mandarin
Meyer lemon
Myrtle-leaved orange
Otaheite lime
Pear lemon
Perfumery varieties
Persian lime
Pomelo
Ponderosa lemon
Rangpur lime
Rough lemon
Satsuma
Seville orange
Shamouti orange
Sour orange
Sweet orange
Tangelo
Tangerine
Tangor
Tosu sour orange
UGLI fruit
Unshiu mandarin
Valencia orange
Variegated Calamondin
Variegated lemon
Volkamer lemon
Yuzu citron
Yuzu lemon

I already emailed the site owner to include Kumquats and Australia's Microcitruses as distinct groups.